[vtkusers] Resizing vtkSliderRepresentation2D

[imran khan]

This is a better solution than mine. Although there should ideally be
something more
evident in the design to implement resizing of widget representations for
adjusting to
resize of window.

Thanks for this.

Imran


On Fri, May 21, 2010 at 1:34 PM, Eric E. Monson <emonson at cs.duke.edu> wrote:

> Okay, I was able to finally get this to work. Instead of calling Render on
> the slider widget, it updates properly if I call
>
> sliderRep.Modified()
>
> after I change those point coordinates and before I call Render() on the
> render window.
>
> I'm not sure exactly how this can help in your situation, Imran...
>
> -Eric
>
> On May 21, 2010, at 1:16 PM, Eric E. Monson wrote:
>
> The other place where I run into trouble with this issue is when I try to
> change the size/placement of the widget. I make calls like this (sliderRep
> is an instance of vtkSliderRepresentation2D, python code):
>
> sliderRep.GetPoint1Coordinate().SetCoordinateSystemToNormalizedDisplay()
> sliderRep.GetPoint1Coordinate().SetValue(0.1 ,0.07)
> sliderRep.GetPoint2Coordinate().SetCoordinateSystemToNormalizedDisplay()
> sliderRep.GetPoint2Coordinate().SetValue(0.9, 0.07)
>
> but even after trying the naive methods of re-rendering the widget and
> window:
>
> sliderWidget.Render()
> renderWindow.Render()
>
> the position of the slider isn't updated until I interact with the window.
>
> -Eric
>
> On May 21, 2010, at 12:41 PM, imran khan wrote:
>
> Karthik:
>
> The issue is that the widget maintains its absolute size when the window is
> resized. It sizes up correctly when
> a mouse interaction happens within the rendered area. So what my hack is
> doing is mimicking a middle button
> press which indirectly resizes the widgets correctly.
>
> It is not clear what changing the Point1Coordinate and a Point2Coordinate
> in normalized coordinates would do. As
> I want to maintain the same normalized locations when the window resizes.
>
> Imran
>
> On Fri, May 21, 2010 at 12:08 PM, Karthik Krishnan <
> karthik.krishnan at kitware.com> wrote:
>
>> I'm not sure what that code snippet does, but this is totally not the
>> right way to resize any widget.
>>
>> The slider representation has a Point1Coordinate and a Point2Coordinate.
>> These define the end points of the slider (in normlized coordinates [-1,
>> 1]). These iVars just aren't exposed. Modify the code yourself (or derive
>> from vtkSliderRepresentation2D) and expose them so as to resize the widget.
>>
>> Thanks
>> --
>> karthik
>>
>>
>>
>>
>>
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